Surname Jupan (พฤหัส 
, Jupan 
) , all around the world, is a rare cognomen. The cognomen Jupan is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and Indonesia. Measured by absolute frequency, this name is the most popular in Thailand, Indonesia, and India. More frequently, Jupan is the forename as well as the last name.